void
trs_timer_event(void)
{
if (timer_on) {
trs_timer_interrupt(1); /* generate */
trs_disk_motoroff_interrupt(trs_disk_motoroff());
trs_kb_heartbeat(); /* part of keyboard stretch kludge */
}
}
unsigned char
trs_interrupt_latch_read()
{
unsigned char tmp = interrupt_latch;
if (trs_model == 1) {
trs_timer_interrupt(0); /* acknowledge this one (only) */
z80_state.irq = (interrupt_latch != 0);
return tmp;
} else {
return ~tmp;
}
}
/* Handle reset button if poweron=0;
handle hard reset or initial poweron if poweron=1 */
void trs_reset(int poweron)
{
trs_emu_mouse = FALSE;
#ifndef ANDROID
/* Close disks opened by Z80 programs */
do_emt_resetdisk();
#endif
/* Reset devices (Model I SYSRES, Model III/4 RESET) */
trs_cassette_reset();
trs_timer_speed(0);
trs_disk_init(poweron); // also inits trs_hard and trs_stringy
/* I'm told that the hard disk controller is enabled on powerup */
/* XXX should trs_hard_init do this, then? */
trs_hard_out(TRS_HARD_CONTROL,
TRS_HARD_SOFTWARE_RESET|TRS_HARD_DEVICE_ENABLE);
if (trs_model == 5) {
/* Switch in boot ROM */
z80_out(0x9C, 1);
}
if (trs_model >= 4) {
/* Turn off various memory map and video mode bits */
z80_out(0x84, 0);
}
if (trs_model >= 3) {
grafyx_write_mode(0);
trs_interrupt_mask_write(0);
trs_nmi_mask_write(0);
}
if (trs_model == 3) {
grafyx_m3_reset();
}
if (trs_model == 1) {
hrg_onoff(0); /* Switch off HRG1B hi-res graphics. */
}
trs_kb_reset(); /* Part of keyboard stretch kludge */
trs_cancel_event();
trs_timer_interrupt(0);
if (poweron || trs_model >= 4) {
/* Reset processor */
z80_reset();
} else {
/* Signal a nonmaskable interrupt. */
trs_reset_button_interrupt(1);
trs_schedule_event(trs_reset_button_interrupt, 0, 2000);
}
}
